I built a teardrop trailer on a similar HF trailer, and I'd use one again. You have to repack the bearings when you build it, and avoid really long, nasty roads, but I've been pretty happy with it so far. Longest trips have been from Denver to Padre Island and Denver to California...no disasters so far.

I've rigged up some wheelbarrow tires on a board to do this, but it is a heavy, bulky and cumbersome prototype at this point.

Well, they don't "fold down". You have to put it together. It is just some spare frame rails I had laying around with some Harbor Freight wheels attached via Holleander speed rail fittings. You can see the side bars strapped to the top of my frame. I leave the wheels attached to the cross pieces.

Here is a shot of the wheel. I used a piece of plywood to mate the wheels to the fittings. I meant to fab a metal piece to do the job, but I haven't gotten around to it yet.

When put together, it ends up looking like this.

It makes it real easy for one person to move the boat by themselves. I have used it to move my fully loaded Aire Cougar when going camping. Here is a shot of Jen moving the 13 foot cat with it.